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adjust MTU for incoming SSU sessions

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orignal 2014-09-18 14:37:29 -04:00
parent cb46d63058
commit 1441c1371b
3 changed files with 38 additions and 20 deletions
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51
SSUData.cpp
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@ -2,6 +2,7 @@
#include <boost/bind.hpp>
#include "Log.h"
#include "Timestamp.h"
#include "NetDb.h"
#include "SSU.h"
#include "SSUData.h"
@ -15,26 +16,7 @@ namespace ssu
m_PacketSize = SSU_MAX_PACKET_SIZE;
auto remoteRouter = session.GetRemoteRouter ();
if (remoteRouter)
{
auto ssuAddress = remoteRouter->GetSSUAddress ();
if (ssuAddress && ssuAddress->mtu)
{
m_PacketSize = ssuAddress->mtu - IPV4_HEADER_SIZE - UDP_HEADER_SIZE;
if (m_PacketSize > 0)
{
// make sure packet size multiple of 16
m_PacketSize >>= 4;
m_PacketSize <<= 4;
if (m_PacketSize > (int)SSU_MAX_PACKET_SIZE) m_PacketSize = SSU_MAX_PACKET_SIZE;
LogPrint ("MTU=", ssuAddress->mtu, " packet size=", m_PacketSize);
}
else
{
LogPrint ("Unexpected MTU ", ssuAddress->mtu);
m_PacketSize = SSU_MAX_PACKET_SIZE;
}
}
}
AdjustPacketSize (*remoteRouter);
}
SSUData::~SSUData ()
@ -49,6 +31,35 @@ namespace ssu
delete it.second;
}
void SSUData::AdjustPacketSize (const i2p::data::RouterInfo& remoteRouter)
{
auto ssuAddress = remoteRouter.GetSSUAddress ();
if (ssuAddress && ssuAddress->mtu)
{
m_PacketSize = ssuAddress->mtu - IPV4_HEADER_SIZE - UDP_HEADER_SIZE;
if (m_PacketSize > 0)
{
// make sure packet size multiple of 16
m_PacketSize >>= 4;
m_PacketSize <<= 4;
if (m_PacketSize > (int)SSU_MAX_PACKET_SIZE) m_PacketSize = SSU_MAX_PACKET_SIZE;
LogPrint ("MTU=", ssuAddress->mtu, " packet size=", m_PacketSize);
}
else
{
LogPrint ("Unexpected MTU ", ssuAddress->mtu);
m_PacketSize = SSU_MAX_PACKET_SIZE;
}
}
}
void SSUData::UpdatePacketSize (const i2p::data::IdentHash& remoteIdent)
{
auto routerInfo = i2p::data::netdb.FindRouter (remoteIdent);
if (routerInfo)
AdjustPacketSize (*routerInfo);
}
void SSUData::ProcessSentMessageAck (uint32_t msgID)
{
auto it = m_SentMessages.find (msgID);